Asynchronous motor rotating speed self-adaptive control method adopting odd-number same-time control

• Main Author: XU HENGBO
• Format: Patent
• Language: Chinese; English
• Published: 29.03.2024
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention provides a method for tracking the rotating speed of an asynchronous motor by adopting odd-number synchronous control. The method comprises the following steps: measuring current in a three-phase static coordinate system of the motor and the rotating speed of the motor through a sensor; then a two-phase rotation current signal is obtained through conversion from three phases to two phases and from static state to rotation; comparing the actual rotating speed with the expected rotating speed to obtain a rotating speed error signal; decomposing the whole control task into a rotating speed control sub-loop, a t-axis current control sub-loop and an m-axis current control sub-loop; and then, an odd-order accumulation iteration item is formed by adopting errors, an odd-order difference item forms an odd-order control rule of each loop, finally, the rotating speed control function of the whole large loop is achieved, and the problem that the traditional PID control performance is insufficient can be so